struggle to one~s knees 和drop out的中文意思

struggle to one~s knees 和drop out的中文意思 Struggle to one's knees bend one's knees的中文意思 Struggle to do sth和struggle to one's feet life's a struggle的中文意思 drop out drop back 的中文意思是什么?思是什么? to drop out和to quit school都有退学的意思,怎么区分啊? stand on one's feet 和struggle to one's feet有什么区别? drop的中文意思 struggle to the end 和 make arduous efforts 的意思! 英语翻译Success grows out of struggle to overcome difficulties.S Desperate struggle的中文意思是什么